Abbreviations

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	S	Siemens
	S	Source of an f.e.t.
	s	Second (unit of Time)
	s.h.f.	Super high frequency
	s.w.	Short wave (approx. 10-60m)
	s.w.g.	Standard wire gauge
	s.w.r.	Standing wave ratio
	s/c	Short circuit
	S/N	Signal-to-noise
	SAE	Society of Automotive Engineers
	SCART	Syndicat des Constructeurs d'Appareils Radio Recepteurs et Televiseurs
	SCR	Silicon-controlled rectifier
	SCSI	Small Computer Systems Interface
	SEMKO	Svenska Elektriska Materielkontrollanstalten
	SEV	Schweizerischer Elektrotechnischer Verein
	SI	International system of units
	SIM	Subscriber Identity Module
	SIMM	Single in-line Memory Module
	SIN	Sine
	SMA	Sub-Miniature 'A' (co-ax connector)
	SMB	Sub-Miniature 'B' (co-ax connector)
	SMC	Sub-Miniature 'C' (co-ax connector)
	SMD	Surface Mount Device
	SMT	Surface Mount Technology
	SNA	Systems Network Architecture
	SNMP	Simple Network Management Protocol
	SOD	Small Outline Device
	SOIC	Small Outline Integrated Circuit
	SOT	Small Outline Transistor
	SPDT	Single pole, double throw
	SPL	Sound pressure level
	spm	strokes per minute
	SPST	Single, pole, single throw
	SSI	Small scale integration
	STP	Screened Twisted Pair Cable
	SVGA	Super Video Graphics Adapter
	SWA	Steel Wire Armoured
	SWL	Safe Working Load